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SWT Resources RAP [message #1007236]

Tue, 05 February 2013 08:17

Tiburon T

Messages: 61
Registered: October 2011

Member

Hello,

I am uncertain on how to handle Resources like Image, Color and Font in RAP. As far as I know they have to be disposed by the creator in SWT, because native OS resources are used.[1]

Now I am wondering, if disposing of these resources is necessary in RAP, too. If they need to be disposed, I would also like to know if they are allocated seperately for each user session or only once for the whole application.

I took a look at org.eclipse.swt.graphics.Image in my RAP workspace and the destroy() method is actually empty, but the documentation of Resource still says: "Applications must dispose of all resources which they allocate."

Thanks,
Tiburon

[1]http://www.eclipse.org/articles/swt-design-2/swt-design-2.html

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Re: SWT Resources RAP [message #1007251 is a reply to message #1007236]

Tue, 05 February 2013 09:20

Ralf Sternberg

Messages: 1313
Registered: July 2009

Senior Member

Hi Tiburon,

in SWT resources must be disposed of because they allocate OS resources.
You're right that in RAP, this is not really necessary, but it also
doesn't hurt. We inherited the JavaDoc from SWT and didn't change this
part, because with single sourcing in mind, it's still a good practice
to do so.

Does that answer your question?

Ralf

--
Ralf Sternberg

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

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